package collection;

import java.util.ArrayList;
import java.util.Collection;

public class CollectionDemo {
    public static void main(String[] args) {
        Collection c = new ArrayList();
        c.add(new Point(1,2));
        c.add(new Point(3,4));
        c.add(new Point(5,6));
        c.add(new Point(7,8));
        c.add(new Point(9,0));
        c.add(new Point(1,2));

        System.out.println(c);

        Point p = new Point(1,2);
        boolean contains = c.contains(p);
        System.out.println("是否包含："+contains);

        c.remove(p);
        System.out.println(c);
        c.remove(p);
        System.out.println(c);

        Collection cc = new ArrayList();
        Point pp = new Point(1,2);
        cc.add(pp);
        System.out.println("pp:"+pp);
        System.out.println("cc:"+cc);

        pp.setX(100);
        System.out.println("pp:"+pp);
        System.out.println("cc:"+cc);



        /*
        Collection c = new ArrayList();
        c.add("one");
        c.add("two");
        c.add("three");
        c.add("four");
        c.add("five");
        System.out.println(c);

        System.out.println("siza:"+c.size());
        System.out.println("是否为空集:"+c.isEmpty());

        c.clear();
        System.out.println("集合已清空");
        System.out.println(c);
        System.out.println("size:"+c.size());
        System.out.println("是否为空集："+c.isEmpty());

         */

    }

}
